Index: pkg/front_end/lib/src/fasta/parser/util.dart |
diff --git a/pkg/front_end/lib/src/fasta/parser/util.dart b/pkg/front_end/lib/src/fasta/parser/util.dart |
new file mode 100644 |
index 0000000000000000000000000000000000000000..f5404ce56a4c112b7d3c689e7018747e923d177c |
--- /dev/null |
+++ b/pkg/front_end/lib/src/fasta/parser/util.dart |
@@ -0,0 +1,12 @@ |
+// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file |
+// for details. All rights reserved. Use of this source code is governed by a |
+// BSD-style license that can be found in the LICENSE file. |
+ |
+library fasta.parser.util; |
+ |
+import '../scanner.dart' show Token; |
+ |
+/// Returns true if [token] is the symbol or keyword [value]. |
+bool optional(String value, Token token) { |
+ return identical(value, token.stringValue); |
+} |